arch/arm64/include/asm/traps.h

File Facts

System

Linux kernel

Corpus path

arch/arm64/include/asm/traps.h

Extension

.h

Size

4850 bytes

Lines

163

Domain

Architecture Layer

Bucket

arch/arm64

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/list.h
• asm/esr.h
• asm/ptrace.h
• asm/sections.h

Detected Declarations

• function try_emulate_armv8_deprecated
• function __in_irqentry_text
• function in_entry_text
• function arm64_is_ras_serror
• function arm64_ras_serror_get_severity
• function arm64_mops_reset_regs
• function ARM

Annotated Snippet

if (option_a ^ wrong_option) {
			/* Format is from Option A; forward set */
			regs->regs[dstreg] = dst + size;
			regs->regs[sizereg] = -size;
		}
	} else {
		/* CPY* instruction */
		unsigned long src = regs->regs[srcreg];
		if (!(option_a ^ wrong_option)) {
			/* Format is from Option B */
			if (regs->pstate & PSR_N_BIT) {
				/* Backward copy */
				regs->regs[dstreg] = dst - size;
				regs->regs[srcreg] = src - size;
			}
		} else {
			/* Format is from Option A */
			if (size & BIT(63)) {
				/* Forward copy */
				regs->regs[dstreg] = dst + size;
				regs->regs[srcreg] = src + size;
				regs->regs[sizereg] = -size;
			}
		}
	}

	if (esr & ESR_ELx_MOPS_ISS_FROM_EPILOGUE)
		regs->pc -= 8;
	else
		regs->pc -= 4;
}
#endif

Annotation

• Immediate include surface: `linux/list.h`, `asm/esr.h`, `asm/ptrace.h`, `asm/sections.h`.
• Detected declarations: `function try_emulate_armv8_deprecated`, `function __in_irqentry_text`, `function in_entry_text`, `function arm64_is_ras_serror`, `function arm64_ras_serror_get_severity`, `function arm64_mops_reset_regs`, `function ARM`.
• Atlas domain: Architecture Layer / arch/arm64.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.